/**
 * Copyright (C) 2010 Nicolas Vahlas <nico@vahlas.eu>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.sung.json.scheam.impl.validators;

import com.sung.json.scheam.TYPE;
import com.sung.json.scheam.impl.JSONValidator;
import com.sung.json.scheam.impl.TYPEFactory;
import org.codehaus.jackson.JsonNode;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

public class TypeValidator implements JSONValidator, Serializable {

    private static final long serialVersionUID = -637068450453946655L;
    private static final Logger LOG = LoggerFactory.getLogger(TypeValidator.class);

    public static final String PROPERTY = "type";

    private TYPE schemaType;
    private UnionTypeValidator unionTypeValidator;

    public TypeValidator(JsonNode schemaNode) {
        schemaType = TYPEFactory.getType(schemaNode);

        if (schemaType == TYPE.UNION) {
            unionTypeValidator = new UnionTypeValidator(schemaNode.get(PROPERTY));
        }

    }

    @Override
    public List<String> validate(JsonNode node, String at) {
        LOG.debug("validate( " + node + ", " + at + ")");
        return validate(node, null, at);
    }

    @Override
    public List<String> validate(JsonNode node, JsonNode parent, String at) {
        LOG.debug("validate( " + node + ", " + parent + ", " + at + ")");
        List<String> errors = new ArrayList<String>();

        if (schemaType == TYPE.UNION) {
            errors.addAll(unionTypeValidator.validate(node, parent, at));
            return errors;
        }

        TYPE nodeType = TYPEFactory.getNodeType(node);
        if (nodeType != schemaType) {
            if (schemaType == TYPE.ANY)
                return errors;

            if (schemaType == TYPE.NUMBER && nodeType == TYPE.INTEGER)
                return errors;

            errors.add(at + ": " + nodeType + " found, " + schemaType + " expected");
        }

        return errors;
    }

}
